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Post by Old Techo on Jul 22, 2019 17:42:21 GMT 10
I came across this today. I wondered why so many people got such a simple test wrong. I will post the answers later....
The world’s shortest IQ test has just three questions, yet fewer than one in five people can answer all three correctly. Dubbed the Cognitive Reflection Test, it comes from a 2005 paper by MIT professor Shane Frederick, who sought to demonstrate the difference between fast thought processes that occur with little conscious deliberation, and those that are slower and more reflective. The test consists of three brain teaser-type questions that are harder than they first appear, where the immediately obvious “right” answer is actually incorrect — if you stop and think about it. “The three items on the CRT are ‘easy’ in the sense that their solution is easily understood when explained, yet reaching the correct answer often requires the suppression of an erroneous answer that springs ‘impulsively’ to mind,” Prof Frederick wrote. Out of 3428 people who took the test, just 17 per cent answered all three questions correctly, more than half got at least one wrong, and one third scored zero out of three. Even among MIT students, the best-performing group, fewer than half got all three right. Here are the questions: 1. A bat and a ball cost $1.10 in total. The bat costs $1 more than the ball. How much does the ball cost? 2. If it takes five machines five minutes to make five widgets, how long would it take 100 machines to make 100 widgets? 3. In a lake, there is a patch of lily pads. Every day, the patch doubles in size. If it takes 48 days for the patch to cover the entire lake, how long would it take for the patch to cover half of the lake? Below are the answers most people guess, and then the correct answers |
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Post by Frank and Brenda on Jul 22, 2019 20:38:50 GMT 10
Anyone want to have a go?
Put come thought into it, it's not that hard really
Hey even I got them right BUT you've got to think about it
Not just your first impulsive answer!
My first impulsive answer to Q1 was wrong but I soon realised that it was incorrect and pt some thought to it
The next 2 Q were easier
Thanks for the brain workout OT
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Deleted
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Post by Deleted on Jul 23, 2019 16:09:05 GMT 10
1. The ball costs 5 cents.
2. Five minutes.
3. 47 days.
Jeff
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Post by GerryP on Jul 23, 2019 16:39:04 GMT 10
My answers eggzakery!  |
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Post by nsgnomad on Jul 23, 2019 18:04:53 GMT 10
1. The ball costs 5 cents. 2. Five minutes. 3. 47 days. Jeff It is easy to get a wrong answer by being impulsive. I got first 2 right and reasoned that for no. 3 that it would cover the last half the lake in 1 day, but impulsive answer came out as 24. So, with 2 out of 3 does that make my IQ 66.666?   |
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Post by Frank and Brenda on Jul 23, 2019 18:12:51 GMT 10
What it doesn't tell us is whether you have to give the first answer you think of ASAP or if you are given time to think it out?
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glanyard
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Post by glanyard on Jul 24, 2019 16:22:58 GMT 10
Those three questions were part of a survey, subject unknown, being conducted by Monash University; there were about 100 other questions in the survey.
glanyard
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avan1950
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Post by avan1950 on Jul 24, 2019 19:19:54 GMT 10
I must be thick, How does the ball not cost 10c
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Post by GerryP on Jul 24, 2019 19:36:41 GMT 10
I must be thick, How does the ball not cost 10c If the ball was 10c and the bat was $1.00 then the bat would be only 90c more than the ball... $1.00 - 10c = 90c more If the ball was 5c and the bat was $1.05 then the bat would be $1.00 more than the ball... $1.05 - 5c = $1.00 Plain as mud eh? |
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Deleted
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Post by Deleted on Jul 24, 2019 19:40:16 GMT 10
I must be thick, How does the ball not cost 10c If the ball costs 10c and the bat costs $1 more than the ball, then the bat must then cost $1.10 - total cost of bat & ball is then $1.20. If the ball costs 5c and the bat costs $1 more than the ball, then the bat must then cost $1.05 - total cost of bat & ball is then $1.10. Jeff Beat me to it Gerry. |
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Post by dieseltojo on Jul 28, 2019 20:35:04 GMT 10
You would have to be an idiot not to get them all correct as I did......
I was clever enough to go straight to the answer. That was the real test. They wanted to find out who was a no good cheat.....opps, I didn;t mean to write that. quote ( Hagred of Harry Potter.) |
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